How to Declare checkbox variable in php

Html checkbox input type not accept normal php variable declaration method, its can use for another way.




Example:

Html Code:

<html>
<body>
<h2>Color Type:</h2>
<form>
<input type="checkbox" name="color[]" value="Red" ><span style="font-size:20px;">Red</span><br>
<input type="checkbox" name="color[]" value="Blue" ><span style="font-size:20px;">Blue</span><br>
<input type="checkbox" name="color[]" value="Green" ><span style="font-size:20px;">Green </span><br>
<input type="checkbox" name="color[]" value="Black" ><span style="font-size:20px;">Black</span>
</form>
</body>
</html>

use name like that method ( name=”color[]”).

php  checkbox variable declaration way for:

<?php 

$color = isset($_POST['color']) ? $_POST['color'] : '';
$check_color  = is_array($color) ? implode(", ", $color) : '';

$query=mysqli_query($con,"insert into job(color)values ('".$check_color."'));

?>

php checkbox variable declaration use for implode and array  because its muti-level system.

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